Formwork system and construction method for circular shaft concrete retaining wall pouring

By using curved steel formwork and stress sensors in the pouring of circular shaft concrete wall guards, the formwork stress changes are monitored in real time and early warnings are provided, which solves the problems of support looseness and space occupation in traditional construction, and improves construction efficiency and quality.

CN120487109APending Publication Date: 2025-08-15CHINA METALLURGICAL CONSTR ENG GRP
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Patent Information

Application Number
CN202510896107.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-06-30
Publication Date
2025-08-15

AI Technical Summary

Technical Problem

During the pouring construction of traditional circular shaft concrete wall guards, the formwork support occupies a large space and is difficult to detect loose support in time, which affects the construction quality and efficiency.

Method used

The curved steel formwork and formwork support structure are adopted, combined with stress sensors and intelligent early warning modules, to monitor the stress changes of the formwork in real time and guide the concrete pouring process.

Benefits of technology

It improves construction efficiency and quality, ensures the stability of the formwork system, avoids the problem of mold increase caused by loose support, and realizes scientific casting control.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention discloses a template system for pouring a concrete retaining wall of a circular vertical shaft, which comprises a vertical shaft pouring template comprising a plurality of arc-shaped steel templates which are sequentially and hermetically butted with one another; the formwork supporting structure comprises a supporting ring and arc-shaped supporting plates correspondingly, coaxially and fixedly arranged on the arc-shaped steel formworks respectively, the supporting ring is detachably and fixedly connected with the arc-shaped supporting plates respectively, the supporting ring is formed by splicing a plurality of arc-shaped limiting plates, and the arc-shaped limiting plates are matched with the inner wall of the vertical shaft pouring formwork. A stress sensor is arranged at the splicing position of every two adjacent arc-shaped limiting plates. A host; an early warning module; the multiple sets of formwork supporting structures are arranged in the height direction of the vertical shaft. The invention further discloses a construction method for pouring the concrete retaining wall of the circular vertical shaft. The formwork system and the construction method for circular shaft concrete retaining wall pouring have the advantages of being high in construction efficiency, beneficial to guaranteeing construction quality and the like.
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Description

Technical Field

[0001] The invention relates to the technical field of vertical shaft construction, and in particular to a template system and a construction method for pouring a circular vertical shaft concrete retaining wall. Background Art

[0002] Before pouring the concrete retaining wall of a circular shaft, it is usually necessary to complete the installation and support of the formwork. During the traditional circular shaft concrete retaining wall pouring construction process, customized steel formwork is generally used, and the support is supported by multiple sets of symmetrical steel pipes. This type of symmetrically supported multiple sets of steel pipes occupies a large amount of space in the shaft, the operating space is narrow, and the support and demolding efficiency is relatively low. At the same time, the steel pipes are generally connected by fasteners, and the support may become loose due to improper connection. These looseness cannot be discovered in time, which can easily cause the formwork to expand and affect the construction quality. In addition, during the pouring process, the pouring speed will also affect the deformation of the formwork. The existing formwork system cannot effectively monitor the deformation of the formwork and can only rely on experience to control the pouring speed, making it difficult to ensure high construction quality.

[0003] Therefore, it is necessary to provide a new formwork system and construction method for pouring circular shaft concrete retaining wall, so as to improve construction efficiency and effectively improve construction quality. Summary of the Invention

[0004] In view of this, the object of the present invention is to provide a formwork system and construction method for pouring circular shaft concrete retaining wall, which has the advantages of high construction efficiency and is conducive to ensuring construction quality.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a formwork system for casting circular shaft concrete retaining walls, comprising: a shaft casting formwork, comprising a plurality of arc-shaped steel formworks sealed and docked with each other in sequence; a formwork support structure, comprising a support ring and arc-shaped support plates respectively coaxially fixed to each arc-shaped steel formwork, the support ring being detachably and fixedly connected to each of the arc-shaped support plates, the support ring being formed by splicing a plurality of arc-shaped limit plates, the plurality of arc-shaped limit plates being adapted to the inner wall of the shaft casting formwork, and stress sensors being provided at the splicing positions of two adjacent arc-shaped limit plates; a host computer, which is respectively connected to the stress sensors for receiving and analyzing the stress data obtained; an early warning module, which is controlled by the host computer and is used for issuing an early warning message when the host computer finds abnormal stress changes during analysis; the formwork support structure is arranged in multiple groups along the height direction of the shaft.

[0006] Furthermore, the two adjacent arc-shaped limiting plates are fixedly connected via an arc-shaped supporting plate on the same arc-shaped steel template.

[0007] Furthermore, the arc-shaped support plate is located in the middle of the corresponding arc-shaped steel template along the arc length direction, and the arc length ratio of the arc-shaped support plate to the corresponding arc-shaped steel template is in the range of 0.5-0.8.

[0008] Furthermore, the arc-shaped limiting plate and the arc-shaped supporting plate are fixedly connected by bolts.

[0009] Furthermore, the arc-shaped limiting plate is overlapped on the top surface of the arc-shaped supporting plate.

[0010] Furthermore, the arc-shaped limiting plate and the arc-shaped supporting plate are both made by cutting metal plates.

[0011] Furthermore, the arc-shaped limiting plate is divided into three sections.

[0012] Furthermore, the formwork support structures are divided into three groups, and are located at the upper, middle and lower positions of the vertical shaft casting formwork respectively.

[0013] A construction method for pouring a circular shaft concrete retaining wall is also provided. The retaining wall pouring construction is completed using the formwork system as described above, and includes the following construction steps:

[0014] S1: Excavate the pit and complete the installation of the formwork system;

[0015] S2: Complete the concrete pouring of the retaining wall according to the warning information issued by the warning module in the formwork system;

[0016] S3: After the concrete strength of the retaining wall reaches the standard, the formwork system is removed.

[0017] Furthermore, in step S2, the early warning module guides the pouring of retaining wall concrete as follows:

[0018] S21: Real-time data acquisition: With a set time as one acquisition cycle, each stress sensor collects real-time stress data values at the corresponding position according to the set sampling frequency and transmits them to the host. The host independently organizes the real-time stress value data transmitted by each stress sensor into a set of raw data sequences in chronological order.

[0019] S22: Data processing: The host processes each group of raw data sequences separately, including: numbering each group of raw data sequences, the number being used to correspond to the stress sensor at each position; then, calculating the difference between two adjacent groups of real-time stress value data within each group, and comparing the absolute value of each calculated difference with the set stress warning threshold and stress safety threshold one by one, wherein:

[0020] If the absolute values of all differences are less than the stress warning threshold, the warning module displays that the status is normal, the concrete pouring continues, and the process returns to step 21 to enter the next data collection cycle;

[0021] If the absolute values of all differences are less than the stress safety threshold, but the absolute value of some differences is greater than or equal to the stress warning threshold, the warning module displays the status as normal and simultaneously displays the number of the original data sequence where the difference is located, and prompts the construction personnel to pay attention to the support status at the position of the stress sensor corresponding to the number and the concrete pouring speed. At the same time, the process returns to step 21 and enters the next data collection cycle.

[0022] If the absolute value of any difference is greater than or equal to the stress safety threshold, the early warning module displays an abnormal status and displays the number of the original data sequence where the difference is located. It also prompts the construction personnel to stop pouring construction immediately, and then organize personnel to conduct a comprehensive inspection and reinforcement of the formwork system, and then return to step 21 to enter the next data collection cycle.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention provides a formwork system and construction method for pouring circular vertical shaft concrete retaining wall. By setting a stress sensor to monitor the stress changes of the formwork in real time and combining it with an intelligent early warning system to guide the concrete pouring process, it solves the problems of difficulty in timely detection of loose supports and lack of scientific data support in traditional construction. It has the advantages of real-time monitoring of formwork stress changes, improving construction safety and pouring quality, and optimizing the working space in the well. At the same time, compared with the existing formwork support system, the formwork support structure of the present application has the advantage of high construction efficiency.

[0025] Other advantages, objects, and features of the present invention will be described in part in the following description and, in part, will be apparent to those skilled in the art upon examination of the following description or may be learned from practice of the present invention. The objects and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the axonometric structure of the template system of the present invention;

[0028] Figure 3 It is a schematic diagram of the top structure of the template system of the present invention.

[0029] Figure numerals: 1-arc steel template; 2-support ring; 201-arc limit plate; 3-arc support plate; 4-stress sensor; 5-host; 6-early warning module. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] See also Figure 1 This embodiment discloses a formwork system for casting a circular shaft concrete retaining wall, comprising: a shaft casting formwork, comprising a plurality of curved steel formworks 1 that are sealed and butted against one another; a formwork support structure, comprising a support ring 2 and a curved support plate 3 coaxially fixed to each curved steel formwork 1; the support ring 2 being detachably fixedly connected to each curved support plate 3; the support ring 2 being composed of a plurality of curved limit plates 201, each of which is adapted to fit the inner wall of the shaft casting formwork; and a stress sensor 4 being provided at the joint between two adjacent curved limit plates 201; a host computer 5, signal-connected to each stress sensor 4 for receiving and analyzing stress data; and an early warning module 6, controlled by the host computer 5, for issuing an early warning message when the host computer 5 detects abnormal stress changes during analysis; and the formwork support structure being arranged in multiple groups along the height direction of the shaft. Specifically, the curved support plates 3 are fixedly connected to the support ring 2 by bolts, and the curved support plates 3 are welded to the curved steel formwork 1. It is understandable that multiple curved steel formworks 1 are docked to form a circular shaft casting formwork. The stress sensor 4 preferably adopts a resistive strain sensor. The host 5 can adopt an industrial control computer equipped with special data processing software. The early warning module 6 can integrate an audible and visual alarm device and a remote communication function. The number of curved limit plates 201 of the support ring 2 can be adjusted according to the diameter of the shaft, and is usually set to 3-5 sections. This technical solution effectively solves the space occupation problem of the traditional support method through the coordinated cooperation of the modular support structure and the intelligent monitoring system. The connection method between the support ring 2 and the curved support plate 3 not only ensures the structural stability, but also facilitates on-site installation and disassembly. The arrangement of the stress sensor 4 realizes real-time stress monitoring of key connection parts, and the early warning mechanism provides a guarantee for construction safety. Compared with the existing technology, this solution significantly improves the space utilization rate of the formwork system, and at the same time avoids construction quality problems caused by loose supports through real-time monitoring. Multiple groups of support structures distributed along the height form a layered support system to ensure overall stability.

[0032] In this embodiment, the two adjacent arc-shaped limit plates 201 are fixedly connected by the arc-shaped support plate 3 on the same arc-shaped steel template 1, that is, the spliced ends of the two adjacent arc-shaped limit plates 201 are located at the position of the arc-shaped steel template. This ensures that the support ring 2 has more reliable stability.

[0033] In this embodiment, the arc-shaped support plate 3 is located in the middle position of the corresponding arc-shaped steel formwork 1 along the arc length direction, and the arc length ratio of the arc-shaped support plate 3 to the corresponding arc-shaped steel formwork 1 is in the range of 0.5-0.8. Specifically, the middle positioning of the arc-shaped support plate 3 can be achieved by calibrating the center line on the inner side of the formwork by a laser locator, and the arc length ratio is controlled by using CNC cutting equipment to accurately cut the support plate. Therefore, this technical solution enables the concrete side pressure to be evenly transmitted to the support ring 2 along the arc surface by accurately setting the support structure in the mechanical neutral zone of the formwork, and is not prone to stress concentration. Finite element analysis shows that when the arc length ratio is less than 0.5, insufficient support area can easily lead to stress concentration at the connection part, while when it is greater than 0.8, it will cause difficulty in segmenting the formwork. Under the premise of ensuring structural rigidity, this design optimizes the force flow transmission path between the support system and the formwork, effectively solving the problem of local stress overload caused by position deviation of the traditional support structure.

[0034] In this embodiment, the curved stopper plate 201 is fixedly connected to the curved support plate 3 by bolts. Specifically, the bolt connection can be implemented using M12 or M16 high-strength bolts with anti-loosening washers. The bolt specifications should match the plate thickness. As a preferred embodiment, internal threaded holes can be pre-set in the curved support plate 3, and through holes can be provided in the curved stopper plate 201, allowing for bidirectional fastening using stud bolts. This technical solution achieves a reliable connection of the curved components through mechanical fastening, where the friction generated by the bolt preload effectively resists lateral pressure during concrete pouring. Compared to traditional fastener connections, this method offers three significant advantages: connection stiffness is increased by approximately 40%, effectively suppressing formwork vibration; disassembly time for a single connection point is reduced to less than 30 seconds, facilitating local maintenance and adjustment; and tightening force can be controlled using a torque wrench to ensure uniform force distribution across all connection points. In specific implementation, high-strength bolts of grade 8.8 or higher are used with elastic washers to further prevent loosening. This standardized connection method not only meets the modular assembly requirements of the formwork system, but also ensures construction safety through quantitative control measures.

[0035] In this embodiment, the arc-shaped limit plate 201 overlaps the top surface of the arc-shaped support plate 3. Specifically, this is a planar overlap, and the bottom surface of the arc-shaped limit plate 201 forms a full contact surface with the top surface of the arc-shaped support plate 3. This technical solution improves the stability of the connection through the dual effects of optimizing the gravity distribution of the contact surface and mechanical interlocking, which helps to reduce the probability of bolt loosening. Due to the increase in the contact surface, the local stress concentration phenomenon is significantly improved, and stable connection performance can still be maintained under cyclic loads. During installation, the overlapping surface can naturally achieve pre-positioning.

[0036] In this embodiment, the arc-shaped limit plate 201 and the arc-shaped support plate 3 are both made by cutting metal plates. The metal plate cutting and manufacturing process can be implemented by laser cutting, plasma cutting or water jet cutting. By adopting the metal plate cutting and manufacturing process, it can be ensured that the arc-shaped component has sufficient strength and rigidity to withstand the lateral pressure during the concrete pouring process. The uniformity and stability of the metal material ensure the consistency of the mechanical properties of the component, and the precise cutting process ensures that multiple sections of the arc-shaped limit plate 201 can be accurately spliced into a complete support ring 2. This manufacturing method not only improves the overall stability of the formwork support system, but also facilitates the standardized production of components and rapid on-site installation.

[0037] In this embodiment, the arc-shaped limit plate 201 is divided into three sections. Specifically, the three-section design of the arc-shaped limit plate 201 can be implemented in the following manner: the curvature of each section of the arc-shaped limit plate 201 is 120 degrees. This technical solution improves the on-site assembly efficiency by more than 40% by designing the support ring 2 as a three-section standardized module. Finite element analysis shows that the stress sensor 4 provided at the joint of the three-section structure can accurately capture the sudden change of the circumferential stress. This optimized design of the number of segments not only meets the requirements of the large-scale formwork system for structural integrity, but also realizes rapid disassembly and assembly through modular design, while providing an ideal layout position for stress monitoring.

[0038] In this embodiment, there are three groups of formwork support structures, which are respectively located at the upper, middle and lower positions of the shaft casting formwork. Specifically, the upper support structure is set at 0.5-1 meters from the top of the formwork, mainly to resist the lateral pressure in the initial stage of pouring; the middle support structure is located in the middle position in the height direction of the formwork, used to maintain the shape of the formwork; the lower support structure is set at 0.5-1 meters from the bottom of the formwork, and bears the maximum pouring load. The number of support structures can be increased according to actual needs, but at least three groups are set to ensure basic stability. This technical solution achieves the overall stability of the formwork system through a layered support design. The three groups of support structures form a three-dimensional support system in space, which can provide targeted support for the force characteristics of different height positions. The upper support prevents deformation of the top of the formwork, the middle support controls the uniform force in the middle of the formwork, and the lower support bears the maximum lateral pressure. As a result, the lateral pressure during concrete pouring is effectively dispersed, avoiding deformation or displacement of the formwork caused by local stress concentration.

[0039] This embodiment also discloses a method for pouring a circular shaft concrete retaining wall, which utilizes the above-described formwork system to complete the pouring of the retaining wall, and includes the following construction steps:

[0040] S1: Excavate the pit and complete the installation of the formwork system;

[0041] S2: Complete the concrete pouring of the retaining wall according to the warning information issued by the warning module 6 in the formwork system;

[0042] S3: After the concrete strength of the retaining wall reaches the standard, the formwork system is removed.

[0043] This technical solution achieves real-time monitoring of the formwork support status by adopting a formwork system with a stress monitoring function. The stress sensor 4 collects the support structure's stress data in real time, and the early warning module 6 provides graded early warnings based on the data analysis results. Construction personnel can adjust the pouring speed or take reinforcement measures based on the early warning information. The entire solution achieves scientific management of the pouring process through data-driven closed-loop control. Compared with existing technologies, this method can promptly detect abnormal conditions in the support structure and avoid problems such as mold expansion caused by loose supports. At the same time, through scientific pouring speed control, it effectively ensures construction quality.

[0044] Furthermore, in step S2, the early warning module 6 guides the pouring of retaining wall concrete as follows:

[0045] S21: Real-time data acquisition: With a set time (e.g., 10 minutes) as one acquisition cycle, each stress sensor 4 collects real-time stress data values at the corresponding position according to a set sampling frequency (e.g., once per minute), and transmits the data to the host 5. The host 5 independently organizes the real-time stress value data transmitted by each stress sensor 4 into a set of raw data sequences in chronological order.

[0046] S22: Data processing: The host 5 processes each set of raw data sequences, including: numbering each set of raw data sequences, the number corresponding to the stress sensor 4 at each position; then, calculating the difference between two adjacent sets of real-time stress value data within each group, and comparing the absolute value of each calculated difference with the set stress warning threshold and stress safety threshold one by one, wherein:

[0047] If the absolute values of all the differences are less than the stress warning threshold, the warning module 6 indicates that the status is normal, the concrete pouring continues, and the process returns to step 21 to enter the next data collection cycle;

[0048] If the absolute values of all the differences are less than the stress safety threshold, but the absolute values of some differences are greater than or equal to the stress warning threshold, the warning module 6 displays the status as normal and simultaneously displays the number of the original data sequence where the difference is located, and prompts the construction personnel to pay attention to the support status at the position of the stress sensor 4 corresponding to the number, as well as the concrete pouring speed. At the same time, the process returns to step 21 and enters the next data collection cycle.

[0049] If the absolute value of any difference is greater than or equal to the stress safety threshold, the early warning module 6 displays an abnormal state and displays the number of the original data sequence where the difference is located, and prompts the construction personnel to stop the pouring construction immediately, and then organize personnel to conduct a comprehensive inspection and reinforcement of the formwork system, and then return to step 21 to enter the next data collection cycle.

[0050] Specifically, the stress sensor 4 can be embedded or surface-mounted, and the sampling frequency can be dynamically adjusted according to the construction phase, for example, increasing the sampling frequency during peak pouring periods. The data processing algorithm can utilize a sliding window method for real-time calculations, and the warning threshold and safety threshold can be determined based on the mechanical properties of the formwork material and structural calculations. The host system 5 can be an industrial control computer equipped with dedicated data processing software for real-time analysis. The warning module 6 can implement multi-level warnings through an audible and visual alarm system and a visual interface that displays stress change curves and abnormal location numbers.

[0051] This technical solution achieves dynamic control of the construction process by establishing a closed-loop control system. The system periodically collects stress data, uses differential analysis to identify stress trends, and triggers a graded response mechanism based on preset thresholds. Compared to traditional methods that rely on manual judgment, this solution can promptly detect localized stress concentrations, accurately locate problem areas, and provide differentiated treatment recommendations based on the severity of the anomaly. This quantitative data-based control method effectively resolves the conflict between pouring speed and formwork deformation control, avoiding formwork deformation or structural damage caused by stress concentration, and improving construction safety and quality control accuracy. The differential analysis method used in data processing effectively eliminates systematic errors, highlights the true trend of stress changes, and provides a reliable basis for construction decision-making. When the absolute value of the differential exceeds the warning threshold but does not reach the safety threshold, a yellow warning signal is issued via an audible and visual alarm in the warning module 6, and the location number of the abnormal sensor is annotated on the human-computer interface.

[0052] This technical solution thus forms a closed-loop control loop through three core steps: During the installation phase, a modular formwork system is used to complete structural construction, laying the foundation for subsequent monitoring; during the intelligent pouring phase, a three-level response mechanism is established through real-time data collection from stress sensors 4 and data analysis and processing by the host computer 5; and once the strength reaches the required level, the formwork system is dismantled to ensure structural safety. Compared with existing technologies, its advantages primarily lie in: Real-time capture of stress changes in the support structure through a network of stress sensors 4 replaces manual observation; Anomaly location is achieved through the raw data sequence established by the host computer 5, resolving the problem of traditional methods being unable to accurately locate loose parts; A graded early warning mechanism enables differentiated management, avoiding the efficiency losses caused by blanket shutdowns; and a feedback mechanism ensures timely resolution of issues, preventing the risk of mold expansion caused by the accumulation of loose supports. This technical solution replaces empirical judgment with data-driven construction decision-making, effectively resolving the technical issues in traditional construction where loose formwork supports cannot be detected promptly and pouring speeds lack scientific basis, resulting in difficulties in ensuring construction quality.

[0053] Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A formwork system for pouring concrete retaining walls in a circular shaft, characterized in that: include: The shaft casting formwork comprises a plurality of curved steel formworks which are sealed and butted against each other in sequence; The formwork support structure includes a support ring and a corresponding arc-shaped support plate coaxially fixed to each arc-shaped steel formwork. The support ring is detachably fixed to each arc-shaped support plate. The support ring is composed of multiple arc-shaped limit plates. The multiple arc-shaped limit plates are adapted to the inner wall of the shaft casting formwork, and a stress sensor is provided at the splicing position of two adjacent arc-shaped limit plates. A host computer, connected to each of the stress sensors for receiving, analyzing and processing the obtained stress data; The early warning module is controlled by the host and is used to issue early warning information when the host analyzes and finds abnormal stress changes; The formwork support structures are arranged in multiple groups along the height direction of the shaft.

2. The formwork system for pouring circular shaft concrete retaining wall according to claim 1, characterized in that: The two adjacent arc-shaped limiting plates are fixedly connected via an arc-shaped supporting plate on the same arc-shaped steel template.

3. The formwork system for pouring circular shaft concrete retaining wall according to claim 1, characterized in that: The arc-shaped support plate is located in the middle of the corresponding arc-shaped steel template along the arc length direction, and the arc length ratio of the arc-shaped support plate to the corresponding arc-shaped steel template is in the range of 0.5-0.

8.

4. The formwork system for pouring circular shaft concrete retaining wall according to claim 1, characterized in that: The arc-shaped limiting plate and the arc-shaped supporting plate are fixedly connected by bolts.

5. The formwork system for pouring circular shaft concrete retaining wall according to claim 4, characterized in that: The arc-shaped limiting plate is overlapped on the top surface of the arc-shaped supporting plate.

6. The formwork system for pouring circular shaft concrete retaining wall according to claim 5, characterized in that: The arc-shaped limiting plate and the arc-shaped supporting plate are both made by cutting metal plates.

7. The formwork system for pouring circular shaft concrete retaining wall according to claim 1, characterized in that: The arc-shaped limiting plate is divided into three sections.

8. The formwork system for pouring circular shaft concrete retaining wall according to claim 1, characterized in that: The formwork support structures are divided into three groups, and are respectively located at the upper, middle and lower positions of the vertical shaft casting formwork.

9. A construction method for pouring concrete retaining wall of a circular shaft, characterized by: The pouring construction of the retaining wall is completed using the formwork system according to any one of claims 1 to 8, comprising the following construction steps: S1: Excavate the pit and complete the installation of the formwork system; S2: Complete the concrete pouring of the retaining wall according to the warning information issued by the warning module in the formwork system; S3: After the concrete strength of the retaining wall reaches the standard, the formwork system is removed.

10. A construction method for pouring concrete retaining wall of a circular vertical shaft according to claim 9, characterized in that: In step S2, the early warning module guides the pouring of retaining wall concrete as follows: S21: Real-time data acquisition: With a set time as one acquisition cycle, each stress sensor collects real-time stress data values at the corresponding position according to the set sampling frequency and transmits them to the host. The host independently organizes the real-time stress value data transmitted by each stress sensor into a set of raw data sequences in chronological order. S22: Data processing: The host processes each group of raw data sequences separately, including: numbering each group of raw data sequences, the number being used to correspond to the stress sensor at each position; then, calculating the difference between two adjacent groups of real-time stress value data within each group, and comparing the absolute value of each calculated difference with the set stress warning threshold and stress safety threshold one by one, wherein: If the absolute values of all differences are less than the stress warning threshold, the warning module displays that the status is normal, the concrete pouring continues, and the process returns to step 21 to enter the next data collection cycle; If the absolute values of all differences are less than the stress safety threshold, but the absolute value of some differences is greater than or equal to the stress warning threshold, the warning module displays the status as normal and simultaneously displays the number of the original data sequence where the difference is located, and prompts the construction personnel to pay attention to the support status at the position of the stress sensor corresponding to the number and the concrete pouring speed. At the same time, the process returns to step 21 and enters the next data collection cycle. If the absolute value of any difference is greater than or equal to the stress safety threshold, the early warning module displays an abnormal status and displays the number of the original data sequence where the difference is located. It also prompts the construction personnel to stop pouring construction immediately, and then organize personnel to conduct a comprehensive inspection and reinforcement of the formwork system, and then return to step 21 to enter the next data collection cycle.

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